Moore and Wright’s MWT-7800 Refractometer is designed to measure the concentration of coolant and cutting fluids. A small sample of fluid is placed on the test slide and the results observed through the eyepiece. When the refractometer is held up to a light, the refractive index of the fluid will deflect the light through the prism and onto a scale at the eyepiece. A blue line will appear on the scale showing the concentration for the fluid, from 0-20 °Bx. This straightforward process gives fast, reliable readings for easy maintenance of correct dilution levels, ensuring ideal lubrication and corrosion protection for machine tools. Features Simple operation Automatic temperature compensation Adjustable focus Recalibration via screw (screwdriver included) Supplied in plastic case with pipette and cleaning cloth